The United States Soccer Federation announced details of this year's Lamar Hunt US Open Cup on Thursday as the nation's oldest annual soccer tournament enters its 98th edition.

Similar to England's FA Cup and other domestic knockout tournaments throughout the world, the US Open Cup is, as the name suggests, open to teams throughout the nation, whether professional or amateur.

The Cup's first round gets underway on June 14 with 16 games. In all, five rounds lead to the final on Oct. 4.

More than 155 teams enter the initial stages of the tournament with a series of qualifying matches whittling that number down to 40 — including 19 professional (eight from MLS) and 21 amateur — for the tournament proper.

Those eight MLS teams join the bracket at the tournament's third round, which will be played on June 18. Six MLS teams have earned automatic berths by way of their overall regular-season finishes, while the remaining two berths will be decided through a series of play-ins.

The Seattle Sounders are the defending champions and have won the last two competitions. Since the inception of MLS in 1996, only one non-MLS team has won the tournament: The USL A-League Rochester Raging Rhinos defeated the Colorado Rapids, 2-0, in 1999.

This year's quarterfinals will be played on July 12 and the semifinals will be played on Aug. 30. All Cup matches are scheduled to be played on Tuesdays.

The 2011 champion collects a $100,000 cash prize, while the runner-up wins $50,000. The top Division III and Amateur Division clubs each receive a $10,000 prize. According to the USSF, no Division II teams will participate in this year's tournament as the North American Soccer League did not obtain provisional sanctioning in time to be included.

United Soccer Leagues Premier Development League (Amateur – 9 teams): The top US-based club from each of nine PDL divisions will qualify based on the results of four pre-selected 2011 regular season games. Each of the 54 teams eligible will play two home and two away matches that will serve as qualifiers.

US Adult Soccer Association (Amateur – 8 teams): The first and second place teams from each of the four US Soccer regions will advance to the tournament. Approximately 50 teams entered qualifying at the local or state level.

National Premier Soccer League (Amateur – 4 teams): The process for determining NPSL qualifying teams will be announced in the coming weeks. The 36-team national amateur league is affiliated with the USASA. In previous years its teams participated via USASA regional qualifying.